[resolved] Get page's parent's slug (post_name) (6 posts)

Hi all, I've been having some trouble getting the slug (post_name) of a page's parent for some time now. I've figured out how to tell if a page is a child of another and all that, but all I can seem to get from that parent is its ID:

Say I have a main page called "Welcome" with the slug "welcome" and a sub-page under Welcome that is called "Hello" with the slug "hello." I need to be able to use the value "welcome" when I'm on the page "Hello"